Exponential Virial Equation of State
Abstract
An equation of state is derived which has promise for the prediction of highdensity fluid behavior. An approximate form of this new equation yields expressions for approximate virial coefficients of all orders as functions of lowerorder exact virial coefficients. Use of only the exact second and third virial coefficients in the secondorder approximate equation leads to accurate prediction of rigidsphere fluid behavior at high densities where even the fourthorder virial equation fails. For real fluids, the secondorder approximate equation is accurate to high densities for temperatures above the Boyle temperature. At moderately lower temperatures, the thirdorder approximate equation yields accurate predictions at high densities where the thirdorder virial equation is in error.
 Publication:

Journal of Chemical Physics
 Pub Date:
 November 1968
 DOI:
 10.1063/1.1670713
 Bibcode:
 1968JChPh..49.4032S